Fisher Price Power Wheels ride on toy car batteries are rechargeable and comes with a 6 month battery warranty. Your Power Wheels® 12 volt and 6 volt battery is equipped with a built-in thermal fuse. The thermal fuse is a self-resetting safety device which automatically “trips” and shuts down operation of the vehicle if the vehicle is overloaded or the driving conditions too severe. Once a fuse has “tripped ”, it will automatically reset itself after approximately 25 seconds and allow the vehicle to resume normal operations. To avoid repeated automatic shutdowns, do not overload the vehicle by exceeding the maximum weight capacity as listed in your Vehicle's Owner's Manual or by towing anything behind the vehicle. Avoid severe driving conditions, such as driving up very steep slopes or running into fixed objects, whcih can cause the wheels to stop spinning while power is still being supplied to the motors. Make sure your child stops the vehicle before switching speeds or direction. If a thermal fuse in a battery continually trips under normal driving conditions, please contact your local Power Wheels® Authorized Service Center or contact Power Wheels Customer Service.